Pulley-changing device



(No Model.) Y

A. J. BURBANK 8v E. L. CHURCH.

PULLEY CHANGING DBVIGE.

10.401,328. PatenteaApr. 16, 1889.

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'McHenry UNITED STATES PATENT @trice ABNER J. BRBANK'AND EUGENE L. CHURCH, OF HARVARD, ILLINOIS.

PU LLEY-CHANGING DEVICE.

SPECIFICATION forming part of Letters Patent No, 401,328, dated April 16, 1889. Application filed December 10, 1888. Serial No. 293,210. (No model.)

To all whom t may concern,.-

Be it known that we, ABNER J. BU RBAN K and EUGENE L. CHURCH, citizens of the United States, residing` at Harvard, in the county of and State of Illinois, have invented a new and useful Improvement in Pulley- Changing Devices, of which the following is a specification.

Our' said invention is a pulleyehanging device to be used in connection with or independently of a hay-earrier, and it willbe hereinafter fully described with reference to the accompanying' drawings, in which- Figure 1 represents a side elevation of the saine in connection with sect-ions of some of the rafters and parts of a building in which it. is used, and Fig. 2 a cross-section in detail of the same made as indicated by the broken line 2 2 in Eig. 1.

In the drawings, A indicates a ridge-beam of a building-roof; Ai, some of its rafters; b, a sufficiently strong beam suspended from rafters A of the building for the hay-carrier to travel upon; B, two plates which may be made of malleable iron, which are bolted to the track-beam Z1, one at each end, as shown; C, arms, one of which is fastened to each of the plates B, their inner ends standing in a hori zontal position, but so far out from the plates as to leave room for the top ends of the clevis F to pass between them, as shown; D, springstops pivoted to the plates B, provided with springs CZ, seated upon the plates, the tension of which holds the feet of the stops down upon the arins C with a certain force, and provided with holes g through the top ends for the endless rope E to pass through, and by means of which the feet are raised against the tension of the springs d to allow the clevis, with its pulley G, to be transferred Jfrom one end of the barn to the other by operatin g the rope E over the track-wire c, the ends of which are secured to the plates B. The endless rope E hangs down in a loop between the end plates, B, and the rest of it passes through eyes i, attached to the rafters, or some of them, above the stops D, through the eyes g in the stops D and around the sheaves s, which turn on their axles n, having their bearin gs in plates B and e, which are fastened together, and also through a hole in clevis E, and it is knotted on each side of the clevis to coniine the same in position.

The sheaves s are indicated bythe circular broken lines in Fig. l.

The operation of the device is simply as follows: By pulling the loop of rope E the foot of the lett stop is raised so that the top of the clevis can pass under it andonto the track-wire c, and then by pulling down the right portion of the loop the clevis is forced to travel on the wire track to the other end of the building, and pass under `'the foot of the stop at that end of the building, and upon letting go the rope the stop by the force of its spring will close down upon and confine it. Then by reversing the operation the clevis can be returned to the left side again.

' 1What we claim as our invention, and desire to secure by Letters Patent, is-A 1. In combination with a track-beam suspended trom the frame of the roof, the plates B, one of which is attached to each end of such beam, each plate being provided with a sh eave, s, and an arm, C, and a wire track, c, connecting said plates, spring-s tops D, and the endless rope E, extending around the sheaves and held up by supports above the plates and provided with a long loop, whereby the clevis F and its pulley are adapted to be moved from one end of the building to the other, substantially as described` 2. In combination with the endless rope E, mounted upon bearings above the sheaves s, as described, the said sheaves, the plates B, and their arms C, the wire track c, connecting said arms, and the spring-stops D, pi. voted to plates B, adapted to be confined or released by operating said rope as required, substantially as described.

' ABNER J. BURBANK. EUGENE L. CHURCH.

Witnesses:

N. E. BLAKE, l-l. T. 'Xi'ooDRUFr-t down on the left side of 

